PHP cURL Request for Web Service Returning Error -

i continue receive error: "failed de-serialize entity" when making rest request below. i'm assuming has formatting of json, can't life of me figure out. appreciated.

//login //set url login $url = $urlroot . "/session";  //build resource request $params = array("encryptedpassword" => false, "indentifier" => $username, "password" => $password);  //json encode parameters $jsonparams = json_encode($params) ;  //set curl resource $ch = curl_init($url); curl_setopt($ch, curlopt_httpheader, array(     "content-type: application/json; charset=utf-8",     "accept: application/json; charset=utf-8",      "x-ig-api-key: ".$apikey,     "version: 1" )); curl_setopt($ch, curlopt_returntransfer, true); curl_setopt($ch, curlopt_post, true);  curl_setopt($ch, curlopt_header, true); curl_setopt($ch, curlopt_postfields, $jsonparams); curl_setopt($ch, curlopt_ssl_verifypeer, false); //**nb delete line production  $result = curl_exec($ch);  //output login response - includes header echo($result) . php_eol;  //close curl resource free system resources curl_close($ch); 

heres's link further details resource i'm trying consume https://labs.ig.com/rest-trading-api-reference/service-detail?id=124

i tried consume service in pure js alone. perhaps contrasting code make error in php obvious someone.

function login() {     // username , password user interface fields    apikey = $("#apikey").val();    var identifier = $("#username").val();    var password = $("#password").val();     if (apikey=="" || identifier=="" || password=="") {        return false;    }     password = encryptedpassword(password);    console.log("encrypted password " + password);     // create login request, ie post request /session    var req = new request();    req.method = "post";    req.url = urlroot + "/session";     // set standard request headers, i.e. api key, request content type (json),     // , expected response content type (json)    req.headers = {       "content-type": "application/json; charset=utf-8",       "accept": "application/json; charset=utf-8",       "x-ig-api-key": apikey,       "version": "2"    };     // set request body user identifier (username) , password    var bodyparams = {};    bodyparams["identifier"] = identifier;    bodyparams["password"] = password;    bodyparams["encryptedpassword"] = true;    req.body = json.stringify(bodyparams);     // prettify request display purposes    $("#request_data").text(js_beautify(req.body) || "");     // send request via javascript ajax call    try {       $.ajax({          type: req.method,          url: req.url,          data: req.body,          headers: req.headers,          async: false,          mimetype: req.binary ? 'text/plain; charset=x-user-defined' : null,          success: function (response, status, data) {              // successful login              // extract account , client session tokens, active account id, , lightstreamer endpoint,             // these required subsequent requests             account_token = data.getresponseheader("x-security-token");             console.log("x-security-token: " + account_token);             client_token = data.getresponseheader("cst");             console.log("cst: " + client_token);             accountid = response.currentaccountid;             lsendpoint = response.lightstreamerendpoint;              // prettify response display purposes             $("#response_data").text(js_beautify(data.responsetext) || "");              // show logged in status message on screen             $("#loginstatus").css("color", "green").text("logged in " + accountid);          },          error: function (response, status, error) {              // login failed, because login id , password aren't correct             handlehttperror(response);          }       });    } catch (e) {       handleexception(e);    }      return true;  } 

json versioned. have make sure version encoding can decoded on other side.

below output of phpinfo(); on php 5.6.3 install:

there various json validation sites one: http://jsonlint.com/